[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. syzkaller login: [ 28.710280] gfs2: fsid=_d: Trying to join cluster "lock_nolock", "_d" [ 28.717968] sysfs: cannot create duplicate filename '/fs/gfs2/_d' [ 28.717988] sysfs: cannot create duplicate filename '/fs/gfs2/_d' [ 28.728111] ------------[ cut here ]------------ [ 28.735243] WARNING: CPU: 1 PID: 7950 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.743459] Kernel panic - not syncing: panic_on_warn set ... [ 28.743459] [ 28.745279] ------------[ cut here ]------------ [ 28.750812] CPU: 1 PID: 7950 Comm: syz-executor862 Not tainted 4.14.230-syzkaller #0 [ 28.755580] WARNING: CPU: 0 PID: 7949 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.763428] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.771627] Modules linked in: [ 28.780955] Call Trace: [ 28.784136] dump_stack+0x1b2/0x281 [ 28.786692] CPU: 0 PID: 7949 Comm: syz-executor862 Not tainted 4.14.230-syzkaller #0 [ 28.790294] panic+0x1f9/0x42d [ 28.798236] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.801405] ? add_taint.cold+0x16/0x16 [ 28.810750] task: ffff8880b50343c0 task.stack: ffff8880975d8000 [ 28.814717] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.820745] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.825130] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.830118] RSP: 0018:ffff8880975df728 EFLAGS: 00010282 [ 28.834501] __warn.cold+0x20/0x44 [ 28.834509] RAX: 0000000000000035 RBX: ffff8880a4af4dd0 RCX: 0000000000000000 [ 28.839868] ? ist_end_non_atomic+0x10/0x10 [ 28.843380] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed1012ebbedb [ 28.851063] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.855356] RBP: ffff8880963f2ec0 R08: 0000000000000035 R09: 0000000000000000 [ 28.862604] report_bug+0x208/0x250 [ 28.866983] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238f882a0 [ 28.874236] do_error_trap+0x195/0x2d0 [ 28.877854] R13: ffff8880b4693300 R14: ffff8880a4af4dd8 R15: ffff88809d5556d8 [ 28.885106] ? math_error+0x2d0/0x2d0 [ 28.888967] FS: 000000000072d300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.896217] ? ___preempt_schedule+0x16/0x18 [ 28.899998] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.908206] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.912592] CR2: 00007f1811fb2130 CR3: 00000000a6e36000 CR4: 00000000001406f0 [ 28.918453] invalid_op+0x1b/0x40 [ 28.923270] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.930519] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.933943] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.941186] RSP: 0018:ffff888096797728 EFLAGS: 00010282 [ 28.946180] Call Trace: [ 28.953427] RAX: 0000000000000035 RBX: ffff88809d5556d0 RCX: 0000000000000000 [ 28.958775] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.961331] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed1012cf2edb [ 28.968579] kobject_add_internal+0x28b/0x930 [ 28.972958] RBP: ffff8880961806c0 R08: 0000000000000035 R09: 0000000000000000 [ 28.980226] kobject_init_and_add+0xde/0x120 [ 28.985155] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238f882a0 [ 28.985163] R13: ffff8880aff4eec0 R14: ffff88809d5556d8 R15: ffff88809daf17d8 [ 28.992423] ? kobject_create_and_add+0x200/0x200 [ 28.996809] ? sysfs_warn_dup.cold+0x17/0x26 [ 29.004053] ? vsnprintf+0x260/0x1340 [ 29.011301] sysfs_create_dir_ns+0x16f/0x1d0 [ 29.016124] gfs2_sys_fs_add+0x184/0x3f0 [ 29.020521] kobject_add_internal+0x28b/0x930 [ 29.024298] ? recover_store+0x100/0x100 [ 29.028683] kobject_init_and_add+0xde/0x120 [ 29.032716] ? snprintf+0xa5/0xd0 [ 29.037189] ? kobject_create_and_add+0x200/0x200 [ 29.041227] ? filemap_write_and_wait+0x86/0xa0 [ 29.045609] ? vsnprintf+0x260/0x1340 [ 29.049038] ? memcpy+0x35/0x50 [ 29.053861] gfs2_sys_fs_add+0x184/0x3f0 [ 29.058503] fill_super+0x118b/0x2310 [ 29.062278] ? recover_store+0x100/0x100 [ 29.065534] ? vsnprintf+0x260/0x1340 [ 29.069568] ? snprintf+0xa5/0xd0 [ 29.073342] ? gfs2_online_uevent+0x1b0/0x1b0 [ 29.077381] ? filemap_write_and_wait+0x86/0xa0 [ 29.081153] ? memcpy+0x35/0x50 [ 29.084581] ? memcpy+0x35/0x50 [ 29.089051] ? pointer+0x9e0/0x9e0 [ 29.093695] fill_super+0x118b/0x2310 [ 29.096951] ? snprintf+0xa5/0xd0 [ 29.100208] ? vsnprintf+0x260/0x1340 [ 29.103732] ? vsprintf+0x30/0x30 [ 29.107514] ? gfs2_online_uevent+0x1b0/0x1b0 [ 29.110948] ? set_blocksize+0x125/0x380 [ 29.114723] ? memcpy+0x35/0x50 [ 29.118155] gfs2_mount+0x439/0x510 [ 29.122629] ? pointer+0x9e0/0x9e0 [ 29.126670] ? fill_super+0x2310/0x2310 [ 29.129924] ? snprintf+0xa5/0xd0 [ 29.133537] ? alloc_pages_current+0x15d/0x260 [ 29.137061] ? vsprintf+0x30/0x30 [ 29.141030] ? __lockdep_init_map+0x100/0x560 [ 29.144460] ? set_blocksize+0x125/0x380 [ 29.149014] mount_fs+0x92/0x2a0 [ 29.152448] gfs2_mount+0x439/0x510 [ 29.156920] vfs_kern_mount.part.0+0x5b/0x470 [ 29.160954] ? fill_super+0x2310/0x2310 [ 29.164298] do_mount+0xe53/0x2a00 [ 29.167910] ? alloc_pages_current+0x15d/0x260 [ 29.172373] ? copy_mount_string+0x40/0x40 [ 29.176319] ? __lockdep_init_map+0x100/0x560 [ 29.179838] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.184407] mount_fs+0x92/0x2a0 [ 29.188623] ? copy_mnt_ns+0xa30/0xa30 [ 29.193097] vfs_kern_mount.part.0+0x5b/0x470 [ 29.198085] ? copy_mount_options+0x1fa/0x2f0 [ 29.201427] do_mount+0xe53/0x2a00 [ 29.205288] ? copy_mnt_ns+0xa30/0xa30 [ 29.209756] ? do_raw_spin_unlock+0x164/0x220 [ 29.209767] ? copy_mount_string+0x40/0x40 [ 29.214235] SyS_mount+0xa8/0x120 [ 29.217752] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.221615] ? copy_mnt_ns+0xa30/0xa30 [ 29.226084] ? copy_mnt_ns+0xa30/0xa30 [ 29.230294] do_syscall_64+0x1d5/0x640 [ 29.233720] ? copy_mount_options+0x1fa/0x2f0 [ 29.238732] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.242590] ? copy_mnt_ns+0xa30/0xa30 [ 29.246453] RIP: 0033:0x4459aa [ 29.250318] SyS_mount+0xa8/0x120 [ 29.254783] RSP: 002b:00007ffd8ae14a68 EFLAGS: 00000282 [ 29.259949] ? copy_mnt_ns+0xa30/0xa30 [ 29.263806] ORIG_RAX: 00000000000000a5 [ 29.266977] do_syscall_64+0x1d5/0x640 [ 29.270403] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459aa [ 29.275744] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.279608] RDX: 0000000020000200 RSI: 0000000020000240 RDI: 00007ffd8ae14a70 [ 29.283557] RIP: 0033:0x4459aa [ 29.287418] RBP: 00007ffd8ae14a70 R08: 00007ffd8ae14ab0 R09: 6f6f6c2f7665642f [ 29.294694] RSP: 002b:00007ffd8ae14a68 EFLAGS: 00000282 [ 29.299870] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 29.307120] ORIG_RAX: 00000000000000a5 [ 29.310290] R13: 0000000000000000 R14: 00007ffd8ae14ab0 R15: 00007ffd8ae14c00 [ 29.317536] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459aa [ 29.322880] Code: [ 29.330122] RDX: 0000000020000200 RSI: 0000000020000240 RDI: 00007ffd8ae14a70 [ 29.334068] bd [ 29.341318] RBP: 00007ffd8ae14a70 R08: 00007ffd8ae14ab0 R09: 6f6f6c2f7665642f [ 29.348564] ea [ 29.350692] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 29.357938] ff [ 29.359806] R13: 0000000000000000 R14: 00007ffd8ae14ab0 R15: 00007ffd8ae14c00 [ 29.367153] ff ff e9 e6 9c a1 fa 4c 89 ff e8 ab d0 7c fa eb da e8 14 2c 53 fa 4c 89 ea 48 89 ee 48 c7 c7 40 a9 95 87 e8 16 fc fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 53 a6 7c fa e8 ee 2b 53 fa 4d [ 29.403223] ---[ end trace 9c8c685236c162ba ]--- [ 29.408456] Kernel Offset: disabled [ 29.412113] Rebooting in 86400 seconds..